🇺🇸 N557AB - Bombardier Learjet 60 - AB Jets FTD557, Northwest Arkansas Ntl (XNA) to University Of Illinois/Willard (CMI) - 5.9 mi away @ 39450 ft, heading NE at 576 mph. Spotted once before. [10:09:10 AM CDT] #A7196E #N557AB #LJ60 #FORTITUDE #FTD557 #ADSB #ADSBbot